semantic highlighting no longer works for js/jsx files

[aeschli]

Hi. As far as I know. typescript's built-in semantic highlighting doesn't work with js files.
https://github.com/microsoft/TypeScript/blob/b1571fcb71501d16f21173979365d4c4d53a11cb/src/services/services.ts#L1888

I checked with the insider version of vscode. Semantic highlight no longer show up on js files on 1.55.0 insider with commit d06d2f1d6245ce00b1c36a9cd81a9087d225173e.

insider version:

1.54:

Originally posted by @jasonlyu123 in #22 (comment)

[GrayJack]

I'm having the same problem, with both javascript and typescript